January 2nd, 2017, 04:44 AM  #1 
Member Joined: May 2016 From: Ireland Posts: 92 Thanks: 1  relative displacement
ship k is 3000m to the west of ship h. ship k is travelling with velocity 12i+6j m/s. what is the minimum speed which h must travel to intercept k. i know there j components must be equal if they are to colide so h must be ai+6j dont know what to do from here 
January 2nd, 2017, 07:29 AM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,508 Thanks: 1234 
$v_h = ai + 6j$ m/s $a = 0$ for the speed of ship h to be a minimum ... why? 
January 2nd, 2017, 01:01 PM  #3 
Member Joined: May 2016 From: Ireland Posts: 92 Thanks: 1 
as when you find out the velocity of it its the loewest at 0 root(o^2+6^2) =6

January 3rd, 2017, 01:35 PM  #4 
Member Joined: May 2016 From: Ireland Posts: 92 Thanks: 1 
the second part of the question is if in fact the speed of h is 10 m/s find the 2 directions in which h may steer in order to intercept k i get 36.86 north of east but i dont get how there is 2 directions 
January 3rd, 2017, 02:55 PM  #5 
Math Team Joined: Jul 2011 From: Texas Posts: 2,508 Thanks: 1234  north of west, also?


Tags 
displacement, relative 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Aether Displacement  mpc755  Physics  60  February 3rd, 2016 06:22 PM 
Displacement mess up.  yogazen2013  Physics  1  September 15th, 2013 10:57 AM 
Particle Displacement  jaredbeach  Calculus  2  February 22nd, 2012 04:05 AM 
Calculus displacement question  rodjav305  Calculus  3  January 11th, 2010 05:34 PM 
Optimising projectile displacement  ~{FSM}~  Physics  12  July 13th, 2008 01:40 AM 